Kerf-cutting machine



0d. 7, 1941. E. J. DOBERSTEIN KERR-CUTTING MACHINE Filed Feb. 25, 1940 3 Sheets-Sheet l INVENEOR' ATTORNEY Ill Ill-h Oct. 7, 1941. E. J. DOBERSTEIN KEEP-CUTTING MACHINE.

Filed Feb. 25, 1940 5 Sheets-Sheet 3 4: llwllll BY ATTORNEY Patented Oct. 7, 1941 KER-F-CUTTING MACHINE Edward J. Doberstein, Blue Island, 111., assignor to Goodman Manufacturing Company, Chicago, 111., a corporation of Illinois 7 Application February 23, 1940, Serial No. 320,238

, 1 claims. no

This invention relates to improvements in kerfcutting machines adapted to cut a horizontal kerf in a mine wall at various intermediate positions between the roof and floor.

Among the objects of my invention are to pro vide a novel form of elevating and tilting support for the cutting element of a mining'machine, arranged to eliminate the usu'alvertically extending guides on opposite sides of the cutting element, and to provide a simplified linkage arrangement to effect vertical adjustment and tilting movement of the cutting element.

Other objects of my invention will appear from time to time as the following specification proceeds and with reference to the accompanying drawings wherein:

Figure 1 is a fragmentary view in side elevation of the forward'portion of a mining machine constructed in accordance with my invention, with certain parts broken away and certain other parts shown in longitudinal section;

Figure 2 is a fragmentary planview of the device shown in Figure 1, with certain parts broken away and certain other parts shown in horizontal section;

Figure '3 is a partial fragmentary transverse sectional view taken substantially along line 3-3 of Figure 2;

Figure 4' is a partial fragmentary transverse sectional view taken substantially along line 4-4 of Figure 2;

Figure 5 is a diagrammatic view of the forward end of the machine, showing the cutting element in one extreme position of vertical adjustment; and

Figure 6 is a diagrammatic view of the front end of the machine, showing the cutting element in an extreme tilted position.

In the drawings, my invention is shown as being embodied in a mining machine of a track mounted type, arranged for cutting out a dirt band in the mine wall and for collecting the cuttings and conveying them away from the machine, such as is disclosed in the Pray Patent No. 2,082,119. Said machine, however, may be of any usual construction and will only be described in so far as is necessary to make my present invention readily understandable. As herein shown, said mining mac 'ne includes a track mounted truck in having a turntable ll mounted adjacent the forward end thereof. Said turn; table is adapted to form a support for a cutting element generally indicated by reference character l2, and to form a means for feeding a pair 1. 262-28) ter bars l3, l3 in an arcuate pathacrossa-coal face.

The cutting element l2 includes a motor 14 having a frame l5 secured to'the forward end thereof and extendingforwardlytherefrom;v The forwardly projecting cutter bars I 3, l3=are secured to said'frame in the usual manner and said frame forms a housing and support means for suitable gearing, driven by said motorv (not shown), which forms a means for driving cutter chains l6, l6 about said cutter bars by means of sprockets l1, I1 -(see Figure 2). 5

With reference now in particular to the novel form of tiltingand elevating mechanism for the cutter bars l3, I3, a bracket member I9 is herein shown as projecting forwardly from the turn table II, adjacent opposite sides thereof. Said bracket member has a pair of spaced apart hearing support members 20,120 projecting upwardly from oppositesides thereof; adjacent its forward end: Each pairof said bearing support members forms a mounting for a'control link 2| on a shaft 22 (see. Figures 1 and 2). Said control links may beindividual independently operable links but, as'herein shown, are connected together by an integrally formed cross member 23 (see Figure 3). Means which will hereinafter be more clearly described are provided for holding said control links inan upright positionor in various desired positions ofadjustmentl u The control links 2|, 2| are operatively connected with the cutting element by means of two pairs of parallel links 24, 24 which are adapted to maintain the cutting element in a position perpendicular to said control "links. The lower parallel links 24 extend rearwardly of said control links, and the forward ends of said links extend within bifurcated lower ends of the links 2|, 2i and are pivotally connectedto the bearing brackets 20, 20 on the shafts 22, 22 (see Figures 2' and 3). The rear ends of said lower parallel links are pivotallyconnected to'the lower ends of bracket members 25, 25 by means of pivotal pins 26, 26. Saidbracket members are herein shown as projecting laterally from opposite sides of the casing of the motor l4 and are of the same length as the control links 2|, 2|, to maintain the parallel relationship of the parallel links 24, 24 (see Figures 1 and 4). 50.

ends of the bracket members 25, 25 by means of of parallel vertically spaced chain-carrying cutpivotal pins 33, 33.,

Elevation of the cutting element I2 is effected by means of a pair of spaced apart parallel longitudinally extending cylinders 35, 35 mounted on the turntable H and extending along opposite sides of the motor I4 (see Figures 2 and 4). Said cylinders may be of any fluid pressiue type, and have suitable pistons (not shown) movable therein. Piston rods 36, 36 extend from said pistons. Each of said piston rods is connected at its forward end to a slidable block 3'! by means of a pivotal pin 38. Said blocks are guided for movement longitudinally of the turntable in gibbed guides 39, 39, the gibbed portions of which extend inwardly and engage upper .shouldered portions 40, 40 of said blocks, to hold said blocks from tipping and to permit sliding mcvement'of said blocks along said turntable, in a plane parallel to the plane of said turntable (see Figures 1 and 3). I

The connection from each of 'said blocks to the cutting element includes an elevating 1ink'44. Said link is pivotally connected to the associated block 3'! at its lower end by a pivotal pin45,

and is pivotally connected at its upper end toa bracket 46, projecting laterally from the frame l5, by means of a pivotal pin 41. Said bracket extends over and forms a shield for the upper end of said link. Said pivotal pins and brackets are located a substantial distance in advance of the blocks 31, 31, when the piston rods 36, 36 are in a retracted position (see Figures 1 and 2'). Said piston rods may thus elevate said cutting element by moving the blocks 37, 31 and elevating links 44, 44 longitudinally along the turntable II, said cutting element being held for movement in a plurality of parallel planes by means of the parallel links '24, 24.

A suitable fluid pressure system (notfshown) is provided to admit fluid under pressure to or release it from the head or piston rod ends of the cylinders 35, 35, or tohold pressure in either ends of said cylinders, to hold the cutting .element in various desired positions of vertical adjustment and to control raising or lowering r thereof. Said fluid pressure system may be of any well known type and is no part of my present invention so will not herein be shown or de scribed in detail.

Cylinders 49,49 and pistons '50, a are ro-.-

vided to hold the control links 21, 2] in a 'vertical position, to position the cutter bars 13, I3 'for horizontal cutting and to- 'tilt said cutting element, by pivoting said control links in a forward or rearward direction about the .axes of the shafts 22, 22 (see Figures 1, 2, 5 and 6). Said cylinders each have 'arearwardly extending projecting portion 52, which is pivotally connected to an upright bracket 53, disposed adjacent the forward end of the turntable, by'means of a pivotal pin 54 (see Figure 1). A'piston rod 55 extends from the piston 55, and is pivotally connected at its free end to an inwardly extending projection 56 of the control link 2|, intermediate the ends thereof, by means of a pivotal pin 51 (see Figures 2 and 8).

The admission of fluid under pressure to the head ends of said cylinders will thus tilt the control links 2|, 21 in a forward direction, to .pivot the brackets 25, 2-5 and the cutting element about the pivotal axes of the shafts 22, 22, in an obvious manner. The admission of fluid under pressure to-the piston rod ends of said cylinders will return the cutting element to a position parallel with the turntable II, or pivotitin an opposite direction about the axes of said shafts, in an obvious manner.

A suitable fluid pressure system (not shown) is provided to admit fluid under pressure to the head or piston rod ends of the cylinders 49, 49, or to hold pressure therein, to hold said control links in various desired positions of adjustment.

While I have herein shown and described one form in which my invention may be embodied, it will be understood that the construction thereof and the arrangement of the various parts may be altered without departing from the spirit and scope thereof. Furthermore, I do not wish to be construed as limiting my invention to the specific embodiment illustrated, excepting as it may be limited in the appended claims.

I claim as my invention:

1. In a mining machine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a pair of parallel links connected between said base and cutting element, means for tilting said parallel links as a unit for tilting said cutting element, extensible means mounted on said base for extensible movement 'therealong, and a connection between said extensible means and said cutting element for elevating o'r lowering said cutting element upon movement of said extensible means along said base.

2. In a; mining machine, a base, a cutting element, and'means for mountingsaid cutting element on said base for vertical adjustment and tilting movement with'respec't thereto including a control link pivoted on said base, a pair of parallel links connected between said control link and Tcutting element, extensible means mounted on said base for extensible movement 'therealong, a connection between said cutting element and said extensible means, for vertically moving said cutting element upon movement of said extensible means, and means for pivotally moving. said control link or holding it in fixed relation with respect to said base, for tilting said cutting element and permitting Vertical adjustment thereof in aiplurality ofparallel planes.

3. In a mining machine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a control link pivotally mounted adjacent one end of said base, a pair 'ofbracket members projecting laterally from opposite sides 'of said cutting element, a pair of parallel links pivotally connected between said bracket members and con trol link, means for pivotally moving said control link or maintaining it in fixed relationship with respect to said cutting element, and a member extensible along said baseby power, having operative connection with said cuttingelement, for "elevating or lowering said cuttingelement While held for movement in a plurality of parallel planesby said parallel links.

4. In a mining machine, abase, 'a'cutting element, and means for mounting said cutting element on'said base for vertical adjustment "and tilting movement with respect thereto including a control link pivotally mounted on said base adjacent one-end thereof, and a pair of parallel links pivotally connected to said control link adjacent opposite ends thereof and having pivotal connection with said cutting element, a member rectilinearly movable along said base,

elevating link pivotally connected betweensaid connection with link, and means fortilting said control link I or rectilinearly movable member and. cutting element, for moving said cutting element vertically in a plurality of parallel planes upon rectilinear movement of said rectilinearly movable member.

; In a miningmachine, a base, a cutting el-e- 1 ment, and meansfor mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a controllink pivotally mounted on said base adjacent' one end thereof, and a pair of parallel links pivotally connected to said control link adjacent opposite ends thereof and having pivotal said cutting element, a member rectilinearly movable along said base, power means for moving said member, an elevating link said member, and means having connectionwith said control link, for tilting said control link and cuttingelement and holding said'control linkand cutting element in tilted relation with respect to said base.

6. In a mining machine, a base, a cutting ele-;

ment extending along said base, and means for mounting said 'cutting-element on said base for vertical adjustment and tilting movement with respect thereto including a member'mounted on said base for rectilinear movement therealong,

means for rectilinearly moving said member along said base, a link pivotally'connecting said rectilinearly movable member with said cutting element, and means for holding said cutting element so said link may cause vertical adjustment of said cutting element in a plurality of parallel planes, upon rectilinear movement of said member, including a parallel link connection between the rear end of said cutting element and the forward end of said base.

'7. In a mining machine, a base, a cutting element extending along said base, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a member mounted on said base for rectilinear movement therealong,

means for rectilinearly moving said member along said base, a link pivotally connecting said rectilinearly movable member with said cutting element, means for holding said cutting element so said link may cause vertical adjustment of said cutting element in a plurality of parallel planes upon rectilinear movement of said member including a parallel link connection betweenthe rear end of said cutting element and the forward end of said base, and means for tilting said cutting element including means for tilting said parallel link connection as a unit.

8. In a mining machine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a member mounted on said base for rectilinear movement therealong, means for rectilinearly moving said member along said base, a link pivotally connecting said rectilinearly movable member with said cutting element, means for holding said cutting element so said link may cause vertical adjustment of said cutting element in a plurality of parallel planes upon rectilinear movement of said member including a parallel link connection between said cutting element and said base, a control link, pivotal connections between said parallel link connections and control holding it in fixed relation with respect tov said base, for tilting said cutting ,element.-

9. In a'mining machine abase, a cutting element extending along saidj base, and means for mounting, said cutting. element on said base for vertical adjustment, and tilting movementwith respect theretoqincluding,apair of spaced apart members mounted on said'base for rectilinear movement along opposite sides of said cutting element, a pair of links pivotally connecting. said members with said cutting element, fluid pressure means for rectilinearly moving; said members along said base, means forholding said cutting element for, movement. in ga plurality of parallel planes upon rectilinear, movement of said members including parallel link connections between opposite sides of the rear endof said cutting element and the forward endof said base, and means for tilting said cutting element including fluid pressure means for tilting said parallel link connections as a unit.

10. In aminingmachine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a pair of,, Spaced apart members mountedonsaid base for rectilinear, movement along opposite sides of said cutting element, apair of links pivotally connecting- ,said members with said cutting element, means forrectilinearly moving said members along saidbase, and, means for holding said cutting element for movement in a plurality of parallel planes upon rectilinear movement of said members including parallel link connections between opposite sides of said cutting element and said base, a pair of control links to which said parallel links are pivotally connected, and means for tilting said control links, for tilting said parallel link connections and cutting element as a unit or for holding said control links in fixed relation with respect to said base.

11. In a mining machine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect-thereto including a pair of spaced apart members mounted on said base for rectilinear movement along opposite sides of said cutting element, a pair of links pivotally connecting said members with said cutting element, means for rectilinearly moving said members along said base, and means for holding said cutting element for movement in a plurality of parallel planes upon rectilinear movement of said members including parallel link connections between opposite sides of said cutting element and said base, said parallel link connections including a pair of bracket members projecting laterally from opposite sides of said cutting element, a pair of control links pivotally mounted on said base, and parallel links pivotally connected between a said members and said control links.

12. In a mining machine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a pair of spaced apart members mounted on said base for rectilinear movement along opposite sides of said cutting element, a pair of links pivotally connecting said members with said cutting element, means for rectilinearly moving said members along said base, and means for holding said cutting element for movement in a plurality of 7 parallel planes upon rectilinear movement of said members including parallel link connections bebetween said base and control links.

13. In a mining machine, a base, a cutting element, and means for mounting said cutting element on said base for vertical adjustment and tilting movement with respect thereto including a pair of spaced apart members mounted on said base for rectilinear movement along opposite sides of said cutting element, a pair of links pivotally connecting-said members with said cutting element, fluid pressure means for rectilinearly moving said members along said base, and means for holding said cutting ele'mentfor movement in a plurality of parallel planes upon rectilinear movement of said members including parallel link connections between opposite sides of said cutting element and said base, said parallel link connections including a pair of bracket members projecting laterally from opposite sides of said cutting element, a pair of control links pivotally mounted on said base, parallel'links pivotally connected between said members and said controllin ks, and means for tilting said cutting element or holding it for vertical adjustment .a plurality of (parallel planes including a pair of fluid pressure "cylinders and pistons pivotally connected between said base and controllinks.

'14, In a miningfmachine, a'base, a cutting element-including a chain carrying cutter bar, and

:means for supporting said cutting element on adjusting said-parallel links relative to said base,

for vertically moving said cutting element in any one of its various tilted positions relative to said base; a

15. In a kerf-cutting machine, a base, a frame having a cutter bar projecting therefrom, a support for said frame including an upright control frame pivotally mounted on said base on a transverse axis, two parallel links pivotally connected between said frame and said control frame,

to permit vertical adjustment of said cutter bar in a plurality of substantially parallel planes perpendicular to said control frame, and means for tilting said control frame to effect tilting adjustment of the cutting planes of said cutter bar relative to said base.

EDWARD J. DOBERSTEIN. 

